How do I fix a noisy engine in my Vauxhall Zafira Life?

I've noticed that my Vauxhall Zafira Life's engine has been making loud noises when I start it up. It sounds like grinding or knocking. What could be causing this and how can I fix it?

It's possible that there could be an issue with your engine's timing belt or serpentine belt. These belts can become worn or damaged over time and can cause loud noises when they need to be replaced. It's important to have them checked and replaced regularly to avoid further damage to your engine.

Another potential cause could be low oil levels. Without enough oil, your engine's moving parts won't be properly lubricated and can create loud noises. Check your oil levels and top up if necessary.

If the noise only occurs when the engine is cold, it could be a sign of a worn or damaged water pump. This component circulates coolant through the engine to prevent overheating. If it's making noise, it may need to be replaced.